Melissa

With a magic word and a flourish, Melissa finished the spell. Nothing happened. The purple pentagram painted carefully on her wooden floor didn't glow, and a portal to a mystical realm didn't appear. Especially disappointing, tentacles didn't burst out of the ground to rip her clothes off and fuck her senseless. Ah, well. She looked down at her outfit, specifically chosen thanks to a friend's recommendation to appease the demon she was summoning. She wore a blood red corset, which cinched her waist a little and propped her tits up beautifully. A black mini-skirt came with it, going down just to her mid-thighs, where it met long black stockings. She wore no panties (hence the wet spot on the floor that grew as she set this up) but added on a subtle black choker on her neck.

With a sigh, she made to get up, but suddenly - a glow! A soft light began emanating from below, which Melissa stared at in wonder from her position on the very edge of the ritual. The wood rippled and began to glow as well, until a sheen of something unknowable replaced it - a doorway to another world. She knew little about what was behind it. The spellbook she'd borrowed from the forbidden section of the library gave scant information: just detailed instructions on the ritual and a few warnings. The rest Melissa gathered from rumors passed down through the Royal Academy for Witches. She saw masses of shapes roiling beneath the surface, and leaned over to get a closer look. She was on her elbows and knees, bent over, when the first one appeared from the very center near her face. It was small and red, no more than an inch at its thickest, with a rounded tip. As it rose it twisted and waved through the air, as if nervously exploring. It was almost... cute?

Melissa licked it, and the tentacle jolted excitedly. The texture was what she expected, and the reptile-like skin was coated with a smooth wetness. To her pleasant surprise, the taste was far from neutral or even repulsive. In fact, it was delicious! She licked it once, twice more, and when she opened her mouth expectantly the tentacle eagerly shot in. Melissa bobbed her head as she sucked in its flavor, and when more tentacles started emerging from the ground, gently wrapping around her shins and forearms as she knelt on the floor, she let them. She knew the substance in her mouth must be an aphrodisiac at the very least, but she wasn't quite sure whether this creature was simply helping her get a couple of satisfying orgasms, or if it was flooding her body with demonic pheromones with the purpose of pushing her body past its limits and literally fucking some of Melissa's magical energy out of her. Oh, well.

Tentacles kept coming out of the ground, one or two at a time, and as they explored her body Melissa began to feel wet trails left along the exposed skin of her upper chest and her thighs as they caressed her. She felt appreciated in a way she certainly hadn't expected to. It was like the tentacles actually desired her -- and the way they then dipped into the top of her corset and pulled it down suggested they definitely did feel something (or at least the creature they were attached to did). The three or four tentacles in the area wasted no time pushing against her tits. They touched her harder with their tips and sides than they had so far, and when one encircled her left breast and squeezed, she couldn't help but moan in pleasure. All without even touching her pussy!

Fortunately that didn't last. Seemingly emboldened by her voiced pleasure, Melissa felt tentacles start creeping under her skirt and corset, until finally one slipped under her panties and brushed up against her clit. Its touch was electric. The way it played with her was deliberate and intelligent, stimulating her in concert with the rest of the slimy appendages caressing her body. Finally it approached her entrance, which after all the teasing was dripping with her arousal. A nudge, then, a push. It slid inside Melissa smoothly as she groaned in pleasure, the tense anticipation quickly evaporating away. After a slower thrust or two for her to adjust, the tentacle began increasing its speed and force, forcing its wonderful way into her over and over again. As if as one they all intensified: the appendage in her mouth pushing further and faster was suddenly pressing into her throat, something Melissa had never liked before but somehow now was amazing; the tentacles around her limbs and body and tits tightening and moving...

It was thrilling. It was delicious. And it was overwhelming. Melissa felt the wave of a massive orgasm approaching her and almost whimpered in anticipation. It came closer and closer as the tentacles kept fucking her, until finally it all pushed her over the edge. Pleasure coursed through her body like a tidal wave. Her eyes rolled towards the back of her head as her body shuddered from the intensity of the feeling. Melissa's extraplanar visitors slowed for beat, withdrawing partially from her orifices and lightening their strain as her orgasm ran its course. As she began to regain her bearings a few seconds later, she felt a new, smaller tentacle pressing onto her rear entrance.

A flash of nervousness greeted her, as she had never taken anything there, quickly replaced by excitement at the prospect. Whether Melissa's sudden willingness came from how worked up the experience had generally made her or from the aphrodisiac of unknown origins was unclear and staggeringly unimportant. She spread her legs a little in an attempt to display this fact to the creature, and after a second felt it push inside. The thrust into her ass was matched by two more into her other wholes, and with just a second for her to get used to the sensation the fucking began anew, this time intensified by the extra tentacle inside her.

Oh gods, she thought vaguely as the tentacles pounded her on all fours. This is... so much better... than any sex I've had before. All three appendages inside her thrusted synchronously in powerful waves of pleasure, the two in her ass and pussy in particular squeezing the skin between them in a wondrous way. It wasn't long before Melissa came again, and again, and before she knew it they were almost constant, the next creeping up as the last was just withering away. She hardly noticed how much wetness was dribbling onto the floor, collected from the tentacles' slime or from her mouth and core.

Soon enough Melissa began to notice the tentacles pulsing inside her, and had her eyes not been closed she would have noticed a subtle red glow permeating the tentacles in rhythm with their thrusts and pulses. Somehow they began to fuck her even harder and faster, pushing gloriously deep inside her, getting warmer and warmer when suddenly they burst, filling her with a hot, sticky liquid. She groaned in pleasure, then gurgled as her body realized it had nowhere to put all that enchanted cum. The tentacles kept pulsing more of it into her, and she kept cumming along with them, until the stuff was dripping from every orifice onto the floor and hands, with more coating her skin and staining her long-forgotten corset.

...

Melissa came to sometime later, curled up in a sticky puddle on the cold wooden floor. She shivered, her mind flashing back to the heated encounter, the evidence of which was now limited to the awfully abundant wetness all over her. She felt good, though - not just satisfied, but powerful, confident in her abilities and ready to conquer the world if she chose to. She then recalled that what she had casted was one of the simplest spells in that collection - what other terrifyingly beautiful things could she get up to?